This is a bag of 15-16 different fossils without dirt. The dirt is to be added later at your facility to save on shipping costs. They are packaged in flat rate USPS boxes and packed 50/box. Our Large Fossil Bag contains at least 15 fossils from all over the world. Each bag may contain shark teeth, sea urchin, whale or dinosaur bone, and numerous other sea fossils. Our bags are packaged in clear plastic bags and weigh about .5lb each. Fossil bags are great for school groups, birthday parties, scout groups, or just plain old fun.